Twin ignition and twin electrical start system for a vehicle

Electricity: battery or capacitor charging or discharging – Serially connected batteries or cells – With discharge of cells or batteries

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307 10BP, 320 15, 320 61, H02J 714

Patent

active

040829928

ABSTRACT:
A circuit arrangement for a vehicle or the like which permits either the vehicle battery or the battery of a camper connected to the vehicle to be selectively used for the ignition voltage of the vehicle engine or for the accessory voltage and which permits either the vehicle battery or the camper battery, or both of these batteries connected in parallel, to be used for energizing the starter motor of the vehicle engine. The conventional electrical system of the vehicle is modified in that a single pole double throw switch is provided for selectively connecting the battery voltage input terminal of the vehicle ignition switch to either the vehicle battery or to the camper battery; a switch is provided in the line connecting the starter control voltage output terminal of the ignition switch to the control input of the vehicle starter relay; a further starter relay is provided for connecting the camper battery to the starter motor; and a further switch is provided for connecting the starter control voltage output terminal of the ignition switch to the control input of the further starter relay. Moreover, the camper battery is connected to the alternator of the vehicle, to permit charging of the camper battery, via normally open contacts of a relay which is energized to close the contacts only when, other than during starting, a voltage is being applied to the ignition system of the vehicle.

REFERENCES:
patent: 3763415 (1973-10-01), Ownby
patent: 3806790 (1974-04-01), Marshall
patent: 3829753 (1974-08-01), Marshall
patent: 3949289 (1976-04-01), Day

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